CVE-2021-37220 · cross-distro fix matrix

CVE-2021-37220: MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-37220 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

mupdf→ fixed in1.17.0+ds1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Debian bookworm

Source: Debian Security Tracker

mupdf→ fixed in1.17.0+ds1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Debian trixie

Source: Debian Security Tracker

mupdf→ fixed in1.17.0+ds1-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y mupdf
```

Are YOU affected by CVE-2021-37220?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2021-37220dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

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